HOLO-KROME 72106 براغي رأس مقبس 1/4-20 X 1-3/4 بوصة | محرك مقبس سداسي | فولاد سبائكي مع أكسيد أسود حراري (100 / عبوة)

I was worried about stripping the heads on these screws, but the hex drive engages firmly and the black oxide finish looks clean on my jig setup. Worked perfectly for securing a tool holder without any wobble.

The hex drive grabs perfectly without stripping, and the black oxide finish feels like it'll hold up well against rust in my jig setup. These screws are exactly what I needed for a fixture build.

Finally, a socket head screw that doesn't strip when I'm torquing down tooling fixtures—the hex drive bites perfectly and the black oxide finish has a nice, grippy feel. I've used about 80 of these for some precision assembly work this week, and the threads are consistently clean with no burrs.